issue_comments: 90798866

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https://github.com/pydata/xarray/issues/66#issuecomment-90798866 https://api.github.com/repos/pydata/xarray/issues/66 90798866 MDEyOklzc3VlQ29tbWVudDkwNzk4ODY2 1217238 2015-04-08T04:21:15Z 2015-04-08T04:21:15Z MEMBER

I wrote a little library to read and write netCDF4 files via h5py the other day: https://github.com/shoyer/h5netcdf

I also merged a preliminary backend for it into xray that should work if you use engine='h5netcdf'. So I think we can consider this issue resolved!

I've also been looking into the netCDF4 data model in a bit more detail, and the good news is that it looks like it does, at least theoretically, support hierarchical dimension scales. This doesn't work in h5netcdf yet, but would be easy to add. Read support into xray would also be straightforward.

Figuring out how to write a hierarchy of xray datasets into the format is less obvious, however. We might need something like a HierarchicalDataset object. I guess using / with variable names in normal Dataset objects would work, though it would help to have something like a pandas MultiIndex to make it easier to actually work with all those variable names.

 
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